Fruity, tangy, and sweet with a splash of tequila - this low-carb grown and sexy grapefruit cocktail might just be your new 2021 fave!
Place the ice cubes into a glass and add the grapefruit juice, lime juice, sugar, and tequila.
Stir to combine until the sugar has dissolved.
Top with the club soda, lime, and grapefruit. Rim with sugar (optional).